/**
 *
 *  Javascript color conversion
 *  http://www.webtoolkit.info/
 *
 **/
 
function HSV(h, s, v) {
    if (h <= 0) { h = 0; }
    if (s <= 0) { s = 0; }
    if (v <= 0) { v = 0; }
 
    if (h > 360) { h = 360; }
    if (s > 100) { s = 100; }
    if (v > 100) { v = 100; }
 
    this.h = h;
    this.s = s;
    this.v = v;
}
 
function RGB(r, g, b) {
    if (r <= 0) { r = 0; }
    if (g <= 0) { g = 0; }
    if (b <= 0) { b = 0; }
 
    if (r > 255) { r = 255; }
    if (g > 255) { g = 255; }
    if (b > 255) { b = 255; }
 
    this.r = r;
    this.g = g;
    this.b = b;
}
 
function CMYK(c, m, y, k) {
    if (c <= 0) { c = 0; }
    if (m <= 0) { m = 0; }
    if (y <= 0) { y = 0; }
    if (k <= 0) { k = 0; }
 
    if (c > 100) { c = 100; }
    if (m > 100) { m = 100; }
    if (y > 100) { y = 100; }
    if (k > 100) { k = 100; }
 
    this.c = c;
    this.m = m;
    this.y = y;
    this.k = k;
}
 
var ColorConverter = {
 
    _RGBtoHSV : function  (RGB) {
	var result = new HSV(0, 0, 0);
 
	r = RGB.r / 255;
	g = RGB.g / 255;
	b = RGB.b / 255;
 
	var minVal = Math.min(r, g, b);
	var maxVal = Math.max(r, g, b);
	var delta = maxVal - minVal;
 
	result.v = maxVal;
 
	if (delta == 0) {
	    result.h = 0;
	    result.s = 0;
	} else {
	    result.s = delta / maxVal;
	    var del_R = (((maxVal - r) / 6) + (delta / 2)) / delta;
	    var del_G = (((maxVal - g) / 6) + (delta / 2)) / delta;
	    var del_B = (((maxVal - b) / 6) + (delta / 2)) / delta;
 
	    if (r == maxVal) { result.h = del_B - del_G; }
	    else if (g == maxVal) { result.h = (1 / 3) + del_R - del_B; }
	    else if (b == maxVal) { result.h = (2 / 3) + del_G - del_R; }
 
	    if (result.h < 0) { result.h += 1; }
	    if (result.h > 1) { result.h -= 1; }
	}
 
	result.h = Math.round(result.h * 360);
	result.s = Math.round(result.s * 100);
	result.v = Math.round(result.v * 100);
 
	return result;
    },
 
    _HSVtoRGB : function  (HSV) {
	var result = new RGB(0, 0, 0);
 
	var h = HSV.h / 360;
	var s = HSV.s / 100;
	var v = HSV.v / 100;
 
	if (s == 0) {
	    result.r = v * 255;
	    result.g = v * 255;
	    result.v = v * 255;
	} else {
	    var_h = h * 6;
	    var_i = Math.floor(var_h);
	    var_1 = v * (1 - s);
	    var_2 = v * (1 - s * (var_h - var_i));
	    var_3 = v * (1 - s * (1 - (var_h - var_i)));
 
	    if (var_i == 0) {var_r = v; var_g = var_3; var_b = var_1}
	    else if (var_i == 1) {var_r = var_2; var_g = v; var_b = var_1}
	    else if (var_i == 2) {var_r = var_1; var_g = v; var_b = var_3}
	    else if (var_i == 3) {var_r = var_1; var_g = var_2; var_b = v}
	    else if (var_i == 4) {var_r = var_3; var_g = var_1; var_b = v}
	    else {var_r = v; var_g = var_1; var_b = var_2};
 
	    result.r = var_r * 255;
	    result.g = var_g * 255;
	    result.b = var_b * 255;
 
	    result.r = Math.round(result.r);
	    result.g = Math.round(result.g);
	    result.b = Math.round(result.b);
	}
 
	return result;
    },
 
    _CMYKtoRGB : function (CMYK){
	var result = new RGB(0, 0, 0);
 
	c = CMYK.c / 100;
	m = CMYK.m / 100;
	y = CMYK.y / 100;
	k = CMYK.k / 100;
 
	result.r = 1 - Math.min( 1, c * ( 1 - k ) + k );
	result.g = 1 - Math.min( 1, m * ( 1 - k ) + k );
	result.b = 1 - Math.min( 1, y * ( 1 - k ) + k );
 
	result.r = Math.round( result.r * 255 );
	result.g = Math.round( result.g * 255 );
	result.b = Math.round( result.b * 255 );
 
	return result;
    },
 
    _RGBtoCMYK : function (RGB){
	var result = new CMYK(0, 0, 0, 0);
 
	r = RGB.r / 255;
	g = RGB.g / 255;
	b = RGB.b / 255;
 
	result.k = Math.min( 1 - r, 1 - g, 1 - b );
	result.c = ( 1 - r - result.k ) / ( 1 - result.k );
	result.m = ( 1 - g - result.k ) / ( 1 - result.k );
	result.y = ( 1 - b - result.k ) / ( 1 - result.k );
 
	result.c = Math.round( result.c * 100 );
	result.m = Math.round( result.m * 100 );
	result.y = Math.round( result.y * 100 );
	result.k = Math.round( result.k * 100 );
 
	return result;
    },
 
    toRGB : function (o) {
	if (o instanceof RGB) { return o; }
	if (o instanceof HSV) {return this._HSVtoRGB(o); }
	if (o instanceof CMYK) { return this._CMYKtoRGB(o); }
    },
 
    toHSV : function (o) {
	if (o instanceof HSV) { return o; }
	if (o instanceof RGB) { return this._RGBtoHSV(o); }
	if (o instanceof CMYK) { return this._RGBtoHSV(this._CMYKtoRGB(o)); }
    },
 
    toCMYK : function (o) {
	if (o instanceof CMYK) { return o; }
	if (o instanceof RGB) { return this._RGBtoCMYK(o); }
	if (o instanceof HSV) { return this._RGBtoCMYK(this._HSVtoRGB(o)); }
    }
    
}